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How much am I spending on water?

In the past, plants often connected process equipment to their incoming city water supply and never gave it another thought. However, since the days of plentiful and cheap city water are gone, and sewer charges are often substantial, self-contained water recirculators and chillers have become a popular option. The cost of water can add up quickly, especially if process equipment is running for several shifts a day. Compounded over time, this

When a chiller is substituted for city water being wasted, the payback can be as short as a year. Use the calculator below to estimate how much is spent on water at your facility.


  1. Rate of flow in gallons per minute (GPM). To measure the flow rate of the water place a flow meter on the outlet line of your equipment. If one is not available, simply measure the time it takes for the outlet flow to fill a five gallon bucket, and then compute your gallons per minute (GPM) of flow.
  2. Unsure about your water rate? It varies by location, but review the table below to help determine typical water and sewage rates.


Usage GPM Annual Water and Sewage Cost
$2.00 Rate $5.00 Rate $8.00 Rate
1 $240 $600 $960
5 $1,200 $3,000 $4,800
10 $2,400 $6,000 $9,600
25 $6,000 $15,000 $24,000
50 $12,000 $30,000 $48,000
75 $18,000 $45,000 $72,000
100 $24,000 $60,000 $96,000

*(per 1,000 gallons) Based on fifty 40 hour weeks